Fairness between two competing TCP flows with shared bottleneck link and same RTT

Dumbbell topology, shared bottleneck link, same RTT, same TCP stack for both flows. Router queue is 20% BDP (results are similar with queue 100% BDP). Experimental setup details.

Graphs are clickable – click on data points to see cwnd and throughput time histories. (Graph data points are the average of at least 5 test runs. Clickable time histories show one test run – the others are available by searching the database).



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Standard TCP, 162ms RTT, 250Mb/s Standard TCP, 82ms RTT, 250Mb/s Standard TCP, 42ms RTT, 250Mb/s HS-TCP, 162ms RTT, 250Mb/s HS-TCP, 324ms RTT, 250Mb/s HS-TCP, 42ms RTT, 250Mb/s HS-TCP, 16ms RTT, 250Mb/s HS-TCP, 22ms RTT, 250Mb/s HS-TCP, 82ms RTT, 250Mb/s BIC-TCP, 162ms RTT, 250Mb/s BIC-TCP, 324ms RTT, 250Mb/s BIC-TCP, 82ms RTT, 250Mb/s BIC-TCP, 16ms RTT, 250Mb/s Standard TCP, 16ms RTT, 250Mb/s Standard TCP, 22ms RTT, 250Mb/s HTCP, 162ms RTT, 250Mb/s HTCP, 324ms RTT, 250Mb/s HTCP, 82ms RTT, 250Mb/s HTCP, 42ms RTT, 250Mb/s HTCP, 22ms RTT, 250Mb/s HTCP, 16ms RTT, 250Mb/s FAST, 324ms RTT, 250Mb/s FAST, 162ms, 250Mb/s FAST, 82ms RTT, 250Mb/s FAST, 42ms RTT, 250Mb/s FAST, 22ms RTT, 250Mb/s FAST, 16ms RTT, 250Mb/s Scalable-TCP, 324ms RTT, 250Mb/s Scalable-TCP, 162ms RTT, 250Mb/s Scalable-TCP, 82ms RTT, 250Mb/s Scalable-TCP, 42ms RTT, 250Mb/s Scalable-TCP, 22ms RTT,250Mb/s